When a slice of buttered toast is accidentally pushed over the edge of a counter, it rotates as it falls. suppose the distance to the floor is 89 cm and the toast rotates less than 1 rev. (a) what is the smallest angular speed that causes the toast to hit and then topple to be butter-side down?

7.38 rad/s

Explanation:

Assume no air resistance, we can first calculate the time it takes for the toast to be dropped 0.89m to the floor. Since we have

where and h = 0.89 m

This is also the time for the toast to flip one time at a constant angular speed. The angle it covered would be at radian.

So the smallest angular speed it needs to hit and topple butter-side down is

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force